Back scatter is a side-effect of e-mail spam, viruses and worms, where e-mail servers receiving spam and other mail send bounce messages to an innocent party. This occurs because the original message's envelope sender is forged to contain the e-mail address of the victim. A very large proportion of such e-mail is sent with a forged From: header, matching the envelope sender.The bulk email software
should produce a number of valuable reports that will provide statistics pertaining to unsubscribers.
Edited by John Marsh, 05 December 2010 - 10:13 PM.